Are You still looking for these notes? I think I have them. They are from my father, whose Uncle was a close friend and associate of Prof. Oppenheimer. I will not reveal anymore information than that at this time But if there is a glimmer of interest may be willing to provide more details on the ephemera and books I inherited from my Father who was also a physicist. All I will say is that my father graduated from Iowa State University with is where his uncle was when he died.

I can hardly believe this. There are very early excellent books on QT, among them Sommerfeld's famous "Wellenmechanischer Ergänzungsband" (1929) and Dirac's "The Principles of Quantum mechanics" (1930). Are there lecture notes by Oppenheimer earlier than this?